Versions and version constraints implementing pub's versioning policy. This is very similar to vanilla semver, with a few corner cases.#dart-pub#semver
A pluggable, mockable file system abstraction for Dart. Supports local file system access, as well as in-memory file systems, record-replay file systems, and chroot file systems.
Provides APIs for debugging and error logging, similar to loggers in other languages, such as the Closure JS Logger and java.util.logging.Logger.#logging#debugging